How do you keep your coupons organized?

Here's my method, and I try to sort through them once a week and take out expired coupons.
Then I take those I'm going to use and paperclip them to my grocery list.
I've found, however, that since I started REALLY collecting coupons, including online ones, that this is getting fuller and my health and beauty section really needs to be broken into several separate section.
I've heard there are some 3-ring binders out there, and I guess if I'm going to get REALLY serious about this, it might be something to consider.

What do you use to keep everything organized and ready for your planning and shopping trips?

Happy long Memorial Day weekend everyone!